Building Earth with pebbles made of chondritic components

Pebble accretion provides new insights into Earth’s building blocks and early protoplanetary disk conditions. Here, we show that mixtures of chondritic components: metal grains, chondrules, calcium-aluminum-rich inclusions (CAIs), and amoeboid olivine aggregates (AOAs) match Earth’s major element composition (Fe, Ni, Si, Mg, Ca, Al, O) within uncertainties, whereas no combination of chondrites and iron meteorites does. Our best fits also match the e54Cr and e50Ti values of Earth precisely, whereas the best fits for chondrites, or components with a high proportion of E chondrules, fail to match Earth. In contrast to some previous studies, our best-fitting component mixture is predominantly carbonaceous, rather than enstatite chondrules. It also includes 15 wt% of early-formed refractory inclusions (CAIs + AOAs), which is similar to that found in some C chondrites (CO, CV, CK), but notably higher than NC chondrites. High abundances of refractory materials are lacking in NC chondrites, bec..., , , # Building Earth with pebbles made of chondritic components

[https://doi.org/10.5061/dryad.41ns1rnqp](https://doi.org/10.5061/dryad.41ns1rnqp)

## Description of the data and file structure

The data represent the compositions found by our best-fitting Component and Chondrite models. It also shows the best-fitting mixtures of various pebbles in those models ( e.g., chondrites and chondritic components) obtained by inversions. Here, IM= Iron meteorite; Chon = Chondrite; MG = Metal grain; Ch = Chondrule; C = Carbonaceous; E/EL/EH = Enstatite; O = Ordinary; CAIs = Calcium-aluminum-rich-inclusions; AOAs = Amoeboid-olivine-aggregates. Elemental composition is given in mg/g. Pebble proportion is given in wt%.Â